Make "Reply" FastMail's Default Setting Instead of "Reply All"
Surely, what you have to say and send will be interesting not only to the sender of the message to which you are reacting; the other recipients the sender included in the To: and Cc: fields will want to get your reply, too. This is what I assume, and what FastMail, assumes, as well: it makes the Reply to All buttons the easiest to reach and use
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